A new alkaloid, guan-fu base Y,has been isolated from Aconitum koreanum (Levl.)Raipaics and shown to be 2-acetoxy-14-hydroxyhetisine (2) from its nmr (1H, 13C) and mass spectra. A completed assignment of mmr peaka was made with the help of NOE and 2-D experiments which also suggest a revised structure (3) for guan-fu baae A (4). © 1986.